word | | Natural hazards |
| December | American Samoa | typhoons common from December to March volcanism: American Samoa experiences limited volcanic activity on the Ofu and Olosega Islands, neither has erupted since the 19th century |
| December | Atlantic Ocean | ... and the Madeira Islands; ships subject to superstructure icing in extreme northern Atlantic from October to May; persistent fog can be a maritime hazard from May to September; hurricanes (May to December |
| December | Benin | hot, dry, dusty harmattan wind may affect north from December to March |
| December | Comoros | cyclones possible during rainy season (December to April); volcanic activity on Grand Comore volcanism: Karthala (elev. 2,361 m) on Grand Comore Island last erupted in 2007; a 2005 eruption forced thousands of ... |
| December | Guam | frequent squalls during rainy season; relatively rare but potentially destructive typhoons (June - December) |
| December | Liberia | dust-laden harmattan winds blow from the Sahara (December to March) |
| December | Micronesia, Federated States of | typhoons (June to December) |
| December | Pacific Ocean | ... Ring of Fire"; subject to tropical cyclones (typhoons) in southeast and east Asia from May to December (most frequent from July to October); tropical cyclones (hurricanes) may form south of Mexico and ... |
| December | Palau | typhoons (June to December) |
| December | Sierra Leone | dry, sand-laden harmattan winds blow from the Sahara (December to February); sandstorms, dust storms |
| Deception | Antarctica | ... the plateau; cyclonic storms form over the ocean and move clockwise along the coast; volcanism on Deception Island and isolated areas of West Antarctica; other seismic activity rare and weak; large icebergs ... |
| deemed | Colombia | ... s most active volcanoes, having erupted in 2009 and 2010 causing major evacuations; it has been deemed a "Decade Volcano" by the International Association of Volcanology and Chemistry of the Earth's ... |
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